<template>
  <el-container class="home-container">
    <!-- 头部区 -->
    <el-header>
      <div>
        <img src="../assets/Stu.png" height="40px" />
        <span>电商后台管理系统</span>
      </div>
      <el-button type="info" @click="logout">退出</el-button>
    </el-header>
    <!-- 页面主题区域 -->
    <el-container>
      <!-- 侧边栏 -->
      <el-aside :width="isCollapse ? '64px' : '270px'">
        <div class="toggle-button" @click="toggleCollapse">|||</div>
        <el-menu
          background-color="#545c64"
          text-color="#fff"
          active-text-color="#409EFF"
          unique-opened
          :collapse="isCollapse"
          :collapse-transition="false"
          router
          :default-active="activePath"
        >
          <!-- 一级菜单 -->
          <el-submenu
            :index="item.id + ''"
            v-for="item in menulist"
            :key="item.id"
          >
            <!-- 一级菜单模板区 -->
            <template slot="title">
              <i :class="iconsObj[item.id]"></i>
              <span>{{ item.authName }}</span>
            </template>
            <!-- 二级菜单 -->
            <el-menu-item
              :index="subitem.path"
              v-for="subitem in item.children"
              :key="subitem.id"
              @click="saveNavState(subitem.path)"
            >
              <template slot="title">
                <i class="el-icon-menu"></i>
                <span>{{ subitem.authName }}</span>
              </template>
            </el-menu-item>
          </el-submenu>
        </el-menu>
      </el-aside>
      <!-- 右侧内容区-->
      <el-main>
        <!-- 路由占位符 -->
        <router-view></router-view>
      </el-main>
    </el-container>
  </el-container>
</template>

<script>
export default {
  name: 'home',
  data() {
    return {
      //左侧菜单数据
      menulist: [],
      iconsObj: {
        125: 'iconfont icon-users',
        103: 'iconfont icon-tijikongjian',
        101: 'iconfont icon-shangpin',
        102: 'iconfont icon-danju',
        145: 'iconfont icon-baobiao',
      },
      isCollapse: false,
      activePath: '',
    }
  },
  methods: {
    logout() {
      sessionStorage.clear()
      this.$router.push('/login')
    },
    //获取所有的菜单
    async getMenuList() {
      const { data: res } = await this.$http.get('menus')
      if (res.meta.status !== 200) return this.$message.error(res.meta.msg)
      this.menulist = res.data
    },
    //点击按钮实现菜单的折叠和展开
    toggleCollapse() {
      this.isCollapse = !this.isCollapse
    },
    //保存链接的激活状态
    saveNavState(activePath) {
      sessionStorage.setItem('activePath', activePath)
      this.activePath = activePath
    },
  },
  created() {
    this.getMenuList()
    this.activePath = sessionStorage.getItem('activePath')
  },
}
</script>

<style lang="less" scoped>
.home-container {
  height: 100%;
}
.el-header {
  background-color: rgb(39, 39, 39);
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: rgb(173, 173, 173);
  font-weight: 600;
  font-size: 20px;
  letter-spacing: 5px;
  > div {
    display: flex;
    align-items: center;
    span {
      margin-left: 15px;
    }
  }
}
.el-aside {
  background-color: #545c64;
  .el-menu {
    border-right: none;
  }
}
.el-main {
  background-color: rgb(255, 255, 255);
}
.iconfont {
  margin-right: 10px;
}
.toggle-button {
  background-color: #4a4d55;
  font-size: 10px;
  line-height: 24px;
  color: #fff;
  text-align: center;
  letter-spacing: 0.2em;
  cursor: pointer;
}
</style>
